Swiss Turning

Swiss-style turning machines side-by-side

Mar 21, 2007

Shops in the market for Swiss-style turning machines often make one of two possible mistakes. The first is that they purchase a machine with all the bells and whistles, thinking that those features will let them handle anything that comes through the door. While this may be true, their machine payments and dollar-per-hour rates typically are so high that it is tough for them to be competitive. The second mistake is that a shop spends as little on a machine as possible, only to discover it handles only a small portion of the jobs that the shop could bid on.

What do Swiss turning machine builders suggest? Swiss turning machines are application driven, so builders recommend shops purchase what they need. And how does a shop find out what it needs? Builders advise that shops gather up drawings of parts they intend to make and have several Swiss turning machine builders review them to determine which machine is appropriately equipped to perform the job. The machine builders also can explain the differences between machine brands.

No matter what the brand of Swiss-style machine, shops that are looking to buy one also should familiarize themselves with the basic machine features and capabilities that are designed to reduce part cycle times. These include tool capacities (driven and stationary), number of tools in the cut at one time, whether the machine is equipped with a fixed or sliding headstock, the machine's main spindle speed, C-axis functions, sub spindles (counter spindles) and programming software. The accompanying chart addresses these features and capabilities for brands of Swiss-style turning machines designed to handle barstock measuring about 20mm in diameter.

Machine

Gildemeister Speed 32-8

KSI Swiss SQC-20/32

Marubeni Citizen-Cincom L20

Nexturn SA 20D

Tornos Deco Sigma 20

Traub TNL 26

Tsugami BE20-V

Total tool capacity

32

22 (optional 24)

11

21

22 (14 front, 8 back)

58 (32 of which can be live)

21

Number of tools in cut simulataneously

3

2

2

2

2

4

2

Fixed or sliding headstock

Sliding

Sliding

Sliding

Sliding

Sliding

Fixed and sliding capabilities

Sliding

Main spindle speed

18,000 rpm

8,000 rpm

10,000 rpm

200-8,000 rpm

100 - 10,000 rpm

8,000 rpm (min.-1)

200 - 12,000 rpm

Sub spindle (counter spindle)

Yes

Yes

Yes

Yes

Optional

Yes

Yes

C axis capability

Two C axes (with driven tools)

C axes (both spindles) (instantaneous indexing)

C axis

Full C axes

Full C axis with 0.001 deg indexing (optional)

C axes (both spindles)

C-axis (optional)

Programming software

Simplified programming from a Fanuc Series 16i control

Part Maker and Virtual Gibbs

Soon to be released

(both spindles, 0.001 deg indexing)

TB Deco or ISO

WinFlex IPS

BE-Abile

Comments

Linear drives for axis accelerations from 0 to 1,574.8 ipm in 0.04 sec